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Compact Lens-less Digital Holographic Microscope for MEMS Inspection and Characterization

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Published on: July 5, 2016

Enhanced sensitivity digital holographic interferometry.

Nazif Demoli, Marc Torzynski, Dalibor Vukicevic

|June 24, 2009

Summary

This summary is machine-generated.

A new digital holographic interferometry method enhances sensitivity for detecting low optical density corona discharges. Post-processing digital recordings improves detection limits for scientific imaging.

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Area of Science:

Physics
Optical Engineering

Background:

Corona discharges exhibit low optical density, challenging detection with standard interferometric techniques.
Existing methods often operate near or below the detection limits for these phenomena.

Purpose of the Study:

To propose and demonstrate a digital holographic interferometry method for enhanced sensitivity in detecting corona discharges.
To improve the detection capabilities for low optical density phenomena.

Main Methods:

Digital holographic interferometry was employed.
Post-processing of digital holographic recordings using point-wise image operations was utilized to enhance sensitivity.
Mathematical description and experimental illustration of the procedure.

Main Results:

The proposed method demonstrated enhanced sensitivity for detecting corona discharges.
Successful detection was achieved for both opaque objects and DC corona discharges in a point-plane geometry.
The post-processing technique effectively improved the detection capabilities.

Conclusions:

Digital holographic interferometry with specific post-processing offers a viable solution for detecting low optical density corona discharges.
The method provides a significant improvement in sensitivity over conventional techniques.
This approach is applicable to various scenarios, including DC corona discharges.